Adjusting apparatus



H.SUNDHAUSSEN. v ADJUSTING APPARATUS. APPLICATION FILED SEPT.3. 1920.

Patented Jan. 25, 1921 2 SHEETS-SHEET l- 32: wemumawa H. SUNDHAUSSEN. Y

ADJUSTING APPARATUS.

APPLICATION man sums. 1920.

Patented Jan. 25,1921.

1,366,433. Fig.2.

2 SHEETS-SHEET 2- 83. GEOMETRlGfiL ENSTRUWENT'? UNITED QFFICE.

HERMANN SUNDI-IAUSSEN, 0F ESSEN, GERMANY, ASSIGNOR TO FRIED. KRUPPAKTIENGESELLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

ADJUSTING- APPARATUS.

Application filed September 3, 1920.

To all whom it may concern:

Be it known that I, HERMANN SUND- HAUSSEN, residing at Essen, Germany, acitizen of the German Republic, have invented a certain new and usefulImprovement in Adjusting Apparatus, of which the following is aspecification.

This invention refers to an adjusting apparatus of a particularlyreadily accessible construction with a worm gearing and an arrangementfor automatically regulating the adjustment effected by the rotation ofthe worm.

The drawings show an adjusting ap paratus as an example of constructionaccording to the present invention intended for ordnance sightingdevices and which serves for the adjustment of the angle of theattachment corresponding to the range of the target and at the same timepermits of taking into account the influence which the diminution of theinitial velocity of the projectile due to erosion of the gun barrel hason the range of the gun.

The invention will be further described with reference to theaccompanying drawings in which- Figure 1 is a side elevation of the gunprovided with the sighting device,

Fig. 2 is a. similar view of the sighting device on a larger scale,

Fig. 3 is a section on the line 3-3 of Fig. 2, looking from above,

Fig. 4 is a section on the line 44 of Fig. 2, looking from the right andFig. 5 is a section on the line 55 of Fig. 2, looking from the left.

To one of the two trunnions A of a gun is rigidly attached an arm A onwhich is rotatably mounted by means of a pin o co axial with thetrunnions a toothed sector 13, provided with a sighting telescope B andwith which toothed sector B gears a worm mounted on a hollow shaft C,which is movable longitudinally but cannot rotate upon a shaft D coaxialwith it and which in its turn is mounted on the arm A and a pro jectionA rigidly attached thereto. The shaft D is driven by means of a shaft Eprovided with a hand wheel 6 and carried in a bearing bracket a attachedto the arm A and positively connected by a bevel wheel gearing e d tothe shaft D. The part of the shaft E, which is situated inside theSpecification of Letters Patent.

Patented Jan. 25, 1921.

Serial No. 408,089.

bearing bracket a is provided with a screw thread 6 (see Fig. 2) andengages in a screw threaded nut F (see particularly Fig. 5) which isguided by a rib longitudinally in a slot a (see Fig. 2) of the bearingbracket a, which rib f carries a reading off mark f for a rangegraduation a arranged on the edge of the slot 64 On the free end of thearm A is rotatably mounted a sector G provided with a series of teethwith which gears a. worm (Z which is detachably connected to theshaft 1) by means of two pins (Z lVith the sector G is rotatablyconnected a crank arm H arranged coaxially therewith and which crank armby means of a clamping screw J passing through a sector-shaped slot g(see Fig. 2) in the sector G can be secured in various angular positionsrelatively to the sector. The various angular positions are indicated bya number of line marks arran ed on the edgeof the sector andcorresponding to the different values of the initial velocity of theprojectiles, and to which marks a graduation k on the crank arm H can beset. To the crank arm H is attached one end of a connecting rod, whichconsists of two screw spindles K and K with threads of opposite pitchand a screw-threaded sleeve K which connects both spindles, and by therotation of which the connecting rod can be adjusted to diflerentlengths. The other end of the connecting rod is attached to a crank arm,which is mounted on the projection A of the arm A and which is connectedto the connecting rod by a link pin N, which is adjustable in a radialslot m (see Fig. 2) in the crank arm M at various distances relativelyto the axis of rotation of the crank arm. According as the angularposition of the crank arm H relatively to the distance of the link boltN from the axis of rotation of the crank arm M, changes so the lawaccording to which the rotation transmitted by the worm gearing (Z g tothe sector G is transmitted by it by connecting rods K K K to the crankarm M is different. The crank gear G H, K K K N M, A A accordingly formsa change speed gear, which is adjustable by various methods oftransmission of movement. The crank arm M is connected to the hollowshaft C by a fork P rotatably mounted thereon by means of a pin p thearms 7 of the said fork embracing the hollow shaft with a certain amountof play and being guided between two collars mounted thereon (see Figs.2 and 4). A rotation of the crank arm NI therefore produces a movementof the hollow shaft C on the shaft D,

and when this movement takes place, the hollow shaft in consequence ofits connection with the shaft D is compelled to take part in itsrotation at the same time. The toothed sector 13 will therefore haveimparted to it by the worm c rigidly connected to the hollow shaft C, arotation, which is composed of the principal move ment effected by therotation of the worm and a regulating movement effected by the axialmovement of the worm. As will be seen ffom the foregoing the principalmovement arising from the rotation of the worm 0 independent of theadjustment is imparted by the change speed gear G H K K K N M A Awhereas the regulating movement is dependent upon the kind of movementtransmission to which the change speed is set. The sector G is adaptedto be locked relatively to the arm A in the angular position shown inthe drawing in which the reading off mark 7 011 the nut F connected tothe sector G points to the beginning point of the graduation a, whichcorresponds to the target distance zero, by means of a bolt Q which isto be passed through a hole in the sector and an eye (a in the arm A Aslong as the gun barrel only shows infinitesimal erosion and thereforethe initial velocity of the projectile retains substantially itsoriginal value, the worm (Z is not yet fixed to the shaft D, and thedisk G is locked by the bolt Q relatively to the arm A. Furthermore thecrank arm M is secured in an angular position, which will be determinedin the manner to be hereinafter described. For this purpose the shaft Dis first so adjusted by turning the hand wheel 6 that the reading offmark f points to the point of commencement of the graduation a. Thenwith the angular position imparted to the shaft D the crank arm M is soadjusted by moving the crank gear H, K K I M A A that the hollow shaft Cwith the worm c is brought to a height at which the sighting line of thetelescope B which on the movement of. the hollow shaft C due to theengagement of the worm 0 in the toothed sector B rotates in a verticaldirection, is parallel with the gun barrel.

' The movement of the crank gear, which is threaded sleeve K Theposition in which after this movement the crank arm H is lockedrelatively to the disk and the link bolt N relatively to the crank arm Mis such as may be desired.

The adjustment of the sighting device to the position corresponding tothe original value of the initial velocity is now completed. Inconsequence of the omission of the worm (Z and owing to the locking ofthe sector G, the crank arm M, when the hand wheel 6 is rotated for thepurpose of adjusting the sighting device to the angle of the attachmentcorresponding to the range of the target, remains at rest, so that nomovement of the hollow shaft C along the shaft D driven by the rotationof the hand wheel 0 can take place. The hollow shaft 0 which isconnected to the shaft D so as to be incapable of rotating and also theworm 0- therefore behave just as if they were rigidly connected to theshaft D. The toothed sector B is therefore rotated through an angleproportionally equal to the angle of rotation of the hand wheel 6 in thedirection of the arrow as and the sighting line, as soon as the readingoff mark f is opposite the graduation mark of the graduationo whichcorresponds to the desired range of the target, has received theinclination relatively to the longitudinal axis of the gun whichcorresponds to this range of the target.

As soon as the initial velocity of the projectiles has dropped owing toerosion of the gun barrel, to a certain value to which the line marklocated on the extreme right of the sector G corresponds, the crank armH, if this has not already been done before, is locked in such aposition relatively to the sector G that the mark h becomes opposite thesaid line mark 9 Furthermore the link bolt N is locked, if this has notalready been done, to the inner ends of the slot m In addition to this,after the shaft D has again been turned back so far, that the mark 7points to the point of commencement of the graduation a, the worm (Z2 isnow locked to the shaft D and brought into engagement with the teeth ofthe sector G provisionally still locked by the bolt Q. Finally byturning the screw threaded sleeve K the hollow shaft C with the worm cis moved so far along the stationary shaft D by means of the crank armM, that on the rotation of the toothed sector B, which takes placeherewith, the sighting line of the telescope B is again parallel withthe longitudinal axis of the gun barrel. The bolt Q, which effects thelocking of the sector G is now removed and the sighting device is thenagain ready for use for the adjustment of the an gle of the attachmentcorresponding to the range of the target.

If now, by turning the hand wheel 6 the as. GEQMETRIQAL iNBTRUaagw-w thetoothed sector is first rotated owing to the rotation of the worm 0through the same angle as in the first adjustment and then owing to thecontinued rotation of the worm it is rotated through a certainadditional ani gle in the direction of the arrow .2. By suitablearrangement of the dimensions of the crank gearing G H, K K K N M A A itcan be insured with suflicient accuracy that for each range of thetarget adjusted on the graduation a, this additional angle is equal tothe angle through which, owing to the diminution of the initial velocityof the projectiles, the angle of the attachment must be increased.

If the erosion of the gun barrel has reached such an extent, that theinitial velocity has dropped to a value to which the next line mark gcorresponds the crank arm H is locked in such a position relatively tothe sector G, that the mark h points to this line mark 9 Furthermore thecrank arm M is again so adjusted in the manner above described byrotating the screw-threaded sleeve K that the sighting line is parallelto the longitudinal axis of the gun barrel, when the mark f points tothe point of commencement of the graduation a. The additional angle bywhich the angle of the attachment corresponding in this case to theoriginal initial velocity is increased is greater than in the previouscase to correspond to the diminution of the initial velocity.

After the crank arm H, on the continuance of the erosion, has beenbrought into a position (indicated by dot and dash lines in Fig. 2) inwhich the mark h points to the line mark situated on the extreme left,allowance may finally be made for further erosion by locking the bolt Nat a greater dis tance from the axis of rotation of the crank M.

Claims.

1. An adjusting apparatus for ordnance sighting devices which comprisesa sighting telescopg a carrier for said telescope aw wo'rfn gearing formoving said carrier and means foraxially shifting said worm gear- 5. Anadjusting apparatus for ordnance sighting devices which comprises asighting telescope, a toothed sector-shaped holder for said telescope, aworm gearing meshing with said telesogpieholder for adjusting saidtelescope, adjustable means for variably shifting said worm gearingaxially.

3. An adjustlng apparatus for ordnance sighting devices comprising anarm rigidly attached to one of the trunnions of a gun, a sector-shapedmember mounted for rotation upon said arm, a sighting telescopesupported by said sector-shaped member, an axially movable worm foroperating said sector-shaped member, means for rotating said worm, saidmeans embodying a range indicating device, and an adjustable deviceconnectible to said worm to move the same axially to compensate for thediminution of the initial velocity of the projectiles due to erosion ofthe gun barrel, substantially as described.

4. An adjusting apparatus for ordnance sighting devices comprises an armrigidly attached to one of the trunnions of a gun, a sector-shapedmember mounted for rotation upon said arm, a sighting telescopesupported by said sector-shaped member, an axially movable worm foroperating said sector-shaped member, means for rotating said worm, saidmeans embodying a range indicating device, a means for moving the wormaxially which comprises a crank arm, a rotatable sector, a second crankarm adjustably mounted with respect to said sector, a worm meshing withsaid sector and means adjustably connecting said first mentioned crankarm to said second crank arm, substantially as and for the purpose setforth.

5. An adjusting apparatus for ordnance sighting devices comprising anadjustable sighting means carrier, a toothed member positively connectedto said sighting means carrier, a driving shaft for adjusting saidtoothed member, a worm gear movable on said driving shaft in axialdirection, means coupling the worm gear to said driving shaft withrespect to rotary movement, said worm gear engaging said toothed member,a rotatable sector positively connected to said driving shaft, a crankarm adjustable relatively to said sector, a second crank arm positivelyconnected to said worm gear for shifting it axially, and a rod ofadjustable length pivotally connected to both crank arms.

6. An adjusting apparatus for ordnance sighting devices comprising an adustable sighting means carrier, a toothed member positively connected tosald sighting means carrier, a driving shaft for adjusting said toothedmember, a worm gear movable on said driving shaft in axial direction,means coupling the worm gear to said driving shaft with respect torotary movement, said worm gear engaging said toothed member, arotatable sector positively connected to said driving shaft, a crank armadjustable relatively to said sector, a second crank arm positivelyconnected to said Worm gear for shifting it axially, and a rod ofadjustable length pivotally connected to both crank arms, one of saidcrank arms also being of adjustable length.

7. An adjusting apparatus for ordnance sighting devices comprising anadjustable sighting means carrier, a toothed member positively connectedto said sighting means carrier, a driving shaft for adjusting saidtoothed member, a Worm gear movable on said driving shaft in axialdirection, means coupling the worm gear to said driving shaft withrespect to rotary movement, said worm gear engaging said toothed member,21

rotatable sector positively connected to said driving shaft, a crank armadjustable relatively to said sector, a second crank arm positivelyconnected to said Worm gear for shifting it axially, and a rod ofadjustable length pivotally connected to both crank arms, said secondcrank arm also being of adjustable length.

The foregoing specification signed at Essen, .Germany, this 20th day ofMay, 1920.

HANS Go'r'rsMANN, Josnr OLBERTZ.

